It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
Almost surely, 250778205404461 is an apocalyptic number.
It is an amenable number.
50778205404461 is a wasteful number, since it uses less digits than its factorization.
50778205404461 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 449364649710.
The spelling of 50778205404461 in words is "fifty trillion, seven hundred seventy-eight billion, two hundred five million, four hundred four thousand, four hundred sixty-one".